Metal-dielectric heterostructures have shown great application potentials in physics, chemistry and material science. In this work, we have designed and manufactured ordered metal-dielectric multiple heterostructures with tunable optical properties, which can be as large as the order of square centimeters in size. We experimentally realized that the surface-enhanced Raman scattering signal of the periodic multiple heterostructures increased 50 times compared with the silicon nanodisk-gold film arrays, which is attributed to the large-scale hotspots and high efficient coupling between the optical cavities and surface plasmon resonance modes. More importantly, the substrate also features a good uniformity and an excellent reproducible fabrication, which is very promising for practical applications.

中文翻译：

---

用于表面增强拉曼散射的大面积金属介电异质结构

金属介电异质结构在物理、化学和材料科学中显示出巨大的应用潜力。在这项工作中，我们设计并制造了具有可调光学特性的有序金属电介质多重异质结构，其尺寸可以达到平方厘米的数量级。我们通过实验发现，与硅纳米盘-金膜阵列相比，周期性多异质结构的表面增强拉曼散射信号增加了 50 倍，这归因于光腔和表面等离子体共振之间的大尺度热点和高效耦合。模式。更重要的是，该基板还具有良好的均匀性和良好的可重复性，在实际应用中非常有前景。